Design of High Volume CFBC Fly Ash Based Calcium Sulphoaluminate Type Binder in Mixtures with Ordinary Portland Cement
Growing concerns on global industrial greenhouse gas emissions have boosted research for developing alternative, less CO2 intensive binders for partial to complete replacement of ordinary Portland cement (OPC) clinker. Unlike slag and pozzolanic siliceous low-Ca class F fly ashes, the Ca- and S-rich...
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| creator | Paaver, Peeter Järvik, Oliver Kirsimäe, Kalle |
| description | Growing concerns on global industrial greenhouse gas emissions have boosted research for developing alternative, less CO2 intensive binders for partial to complete replacement of ordinary Portland cement (OPC) clinker. Unlike slag and pozzolanic siliceous low-Ca class F fly ashes, the Ca- and S-rich class C ashes, particularly these formed in circulating fluidised bed combustion (CFBC) boilers, are typically not considered as viable cementitious materials for blending with or substituting the OPC. We studied the physical, chemical-mineralogical characteristics of the mechanically activated Ca-rich CFBC fly ash pastes and mortars with high volume OPC substitution rates to find potential alternatives for OPC in building materials and composites. Our findings indicate that compressive strength of pastes and mortars made with partial to complete replacement of the mechanically activated CFBC ash to OPC is comparable to OPC concrete, showing compared to OPC pastes reduction in compressive strength only by |
| doi_str_mv | 10.3390/ma14195798 |
| format | Article |
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Unlike slag and pozzolanic siliceous low-Ca class F fly ashes, the Ca- and S-rich class C ashes, particularly these formed in circulating fluidised bed combustion (CFBC) boilers, are typically not considered as viable cementitious materials for blending with or substituting the OPC. We studied the physical, chemical-mineralogical characteristics of the mechanically activated Ca-rich CFBC fly ash pastes and mortars with high volume OPC substitution rates to find potential alternatives for OPC in building materials and composites. Our findings indicate that compressive strength of pastes and mortars made with partial to complete replacement of the mechanically activated CFBC ash to OPC is comparable to OPC concrete, showing compared to OPC pastes reduction in compressive strength only by <10% at 50% and <20% at 75% replacement rates. Our results show that mechanically activated Ca-rich CFBC fly ash can be successfully used as an alternative CSA-cement type binder.</description><identifier>ISSN: 1996-1944</identifier><identifier>EISSN: 1996-1944</identifier><identifier>DOI: 10.3390/ma14195798</identifier><identifier>PMID: 34640194</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Boilers ; Building materials ; Carbon dioxide ; Cement ; Clinker ; Compressive strength ; Construction materials ; Flue gas ; Fluidized bed combustion ; Fly ash ; Grain size ; Greenhouse gases ; Hydration ; Industrial plant emissions ; Industrial wastes ; Mortars (material) ; Oil shale ; Particle size ; Pastes ; Portland cements ; X-rays</subject><ispartof>Materials, 2021-10, Vol.14 (19), p.5798</ispartof><rights>2021 by the authors. Licensee MDPI, Basel, Switzerland. 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Our results show that mechanically activated Ca-rich CFBC fly ash can be successfully used as an alternative CSA-cement type binder.</description><subject>Boilers</subject><subject>Building materials</subject><subject>Carbon dioxide</subject><subject>Cement</subject><subject>Clinker</subject><subject>Compressive strength</subject><subject>Construction materials</subject><subject>Flue gas</subject><subject>Fluidized bed combustion</subject><subject>Fly ash</subject><subject>Grain size</subject><subject>Greenhouse gases</subject><subject>Hydration</subject><subject>Industrial plant emissions</subject><subject>Industrial wastes</subject><subject>Mortars (material)</subject><subject>Oil shale</subject><subject>Particle size</subject><subject>Pastes</subject><subject>Portland cements</subject><subject>X-rays</subject><issn>1996-1944</issn><issn>1996-1944</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNpdkVtLxDAQhYMoKrov_oKALyKsJiZN0xfBra4KioKX15Cm022kbdakVfffG13xNi8zMB9nzmEQ2qHkgLGMHLaacpolaSZX0CbNMjGmGeerv-YNNArhicRijMqjbB1tMC44ibtN9HIKwc467Cp8YWc1fnTN0ALOp5McT5sFPgk1nugAJc51Y-zQ4ruhmddOR8x2ugd8v5gDntiuBI9th6_tWz94CPjV9jW-8WWk_ALfOt83uosy0ELXb6O1SjcBRl99Cz1Mz-7zi_HVzfllfnI1NkyyfgyiSIWpEml4yktmYlCgVJRQGFEZzhJTVaxIyqISQjAti8KQkqVQJJQnGhjbQsdL3flQtFCaeNrrRs29baMr5bRVfzedrdXMvSiZUELTLArsfQl49zxA6FVrg4EmZgE3BHWUSCoJ5_Lj1u4_9MkNvovxPinCGRE8UvtLyngXgofq2wwl6uOj6uej7B16_5LO</recordid><startdate>20211003</startdate><enddate>20211003</enddate><creator>Paaver, Peeter</creator><creator>Järvik, Oliver</creator><creator>Kirsimäe, Kalle</creator><general>MDPI AG</general><general>MDPI</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20211003</creationdate><title>Design of High Volume CFBC Fly Ash Based Calcium Sulphoaluminate Type Binder in Mixtures with Ordinary Portland Cement</title><author>Paaver, Peeter ; 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Unlike slag and pozzolanic siliceous low-Ca class F fly ashes, the Ca- and S-rich class C ashes, particularly these formed in circulating fluidised bed combustion (CFBC) boilers, are typically not considered as viable cementitious materials for blending with or substituting the OPC. We studied the physical, chemical-mineralogical characteristics of the mechanically activated Ca-rich CFBC fly ash pastes and mortars with high volume OPC substitution rates to find potential alternatives for OPC in building materials and composites. Our findings indicate that compressive strength of pastes and mortars made with partial to complete replacement of the mechanically activated CFBC ash to OPC is comparable to OPC concrete, showing compared to OPC pastes reduction in compressive strength only by <10% at 50% and <20% at 75% replacement rates. 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| source | MDPI - Multidisciplinary Digital Publishing Institute; EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry; PubMed Central Open Access |
| subjects | Boilers Building materials Carbon dioxide Cement Clinker Compressive strength Construction materials Flue gas Fluidized bed combustion Fly ash Grain size Greenhouse gases Hydration Industrial plant emissions Industrial wastes Mortars (material) Oil shale Particle size Pastes Portland cements X-rays |
| title | Design of High Volume CFBC Fly Ash Based Calcium Sulphoaluminate Type Binder in Mixtures with Ordinary Portland Cement |
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